package cn.tedu.boot02.controller;

import cn.tedu.boot02.entity.User;
import cn.tedu.boot02.utils.DBUtil;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

@RestController
public class UserController {
    @RequestMapping("/reg")
    public String reg(User user){
        System.out.println("user = " + user);

        try (Connection con=DBUtil.getConnection()){
            String sql="SELECT id FROM user WHERE username=?";
            PreparedStatement ps=con.prepareStatement(sql);
            ps.setString(1,user.getUsername());
            ResultSet rs=ps.executeQuery();
            if(rs.next()){
                return "用户名已存在";
            }
            String insertSql="INSERT INTO user VALUES (NULL,?,?,?)";
            PreparedStatement insertPs=con.prepareStatement(insertSql);
            insertPs.setString(1,user.getUsername());
            insertPs.setString(2,user.getPassword());
            insertPs.setString(3,user.getNickname());
            insertPs.executeUpdate();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return "注册成功!";
    }

    @RequestMapping("/login")
    public String login(User user){
        try(Connection con=DBUtil.getConnection()) {
            String sql="SELECT password FROM user WHERE username=?";
            PreparedStatement ps=con.prepareStatement(sql);
            ps.setString(1,user.getUsername());
            ResultSet rs= ps.executeQuery();
            if(rs.next()){
                String pw=rs.getString("password");
                if(pw.equals(user.getPassword())){
                    return "登录成功!";
                }
                return "密码错误";
            }
        } catch (Exception e) {

        }
        return "用户名不存在";
    }
}
